c# - Entity Framework 存储过程 - 映射复杂属性

Question

我有一个 edmx 数据存储，我正在尝试针对它执行存储过程:

.
.
.
CustomerDb.ExecuteStoreQuery<Customer>("GetCustomers", parameters).ToList();

客户类别具有以下结构

class Customer {
    public int Id { get; set; }
    .
    .
    .
    public Address Address { get; set; }
}

class Address {
    public int Id { get; set; }
    .
    .
    .
    public string PostCode { get; set; }
}

现在，无论我做什么，Address 属性始终为 null。我尝试过以不同的格式返回结果集，但无论我做什么它总是为空。

例如

SELECT c.Id, ..., a.PostCode
FROM Customer AS c
INNER JOIN Address AS a ON c.CustomerId = a.CustomerId
WHERE c.CustomerId = @CustomerId

或

SELECT c.Id, ..., a.PostCode AS 'Address.PostCode'
FROM Customer AS c
INNER JOIN Address AS a ON c.CustomerId = a.CustomerId
WHERE c.CustomerId = @CustomerId

或

SELECT c.Id, ..., a.PostCode AS 'Address_PostCode'
FROM Customer AS c
INNER JOIN Address AS a ON c.CustomerId = a.CustomerId
WHERE c.CustomerId = @CustomerId

但是这些列永远不会被拾取。

我做错了什么？

谢谢。

Answer 1

我认为你不能这样做。根据MSDN

Each property of the type:

• Must have a setter.

• Must correspond to a primitive type in CSDL.

• Must correspond to a column name in the resulting DbDataReader (the provider implementation determines whether a column has the same name as the property). If the name of the type's property does not match a field of the DbDataReader, the Entity Framework materializes the default value of the property if it is defined in the conceptutal model.

您的地址是 CSDL 中的 ComplexType。我认为您必须使用可以通过 ExecuteStoreQuery 实现的类型来构造对象。